4WNQ

THE MOLECULAR BASES OF DELTA/ALPHA-BETA T-CELL MEDIATED ANTIGEN RECOGNITION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The molecular bases of delta / alpha beta T cell-mediated antigen recognition.

Pellicci, D.G.Uldrich, A.P.Le Nours, J.Ross, F.Chabrol, E.Eckle, S.B.de Boer, R.Lim, R.T.McPherson, K.Besra, G.Howell, A.R.Moretta, L.McCluskey, J.Heemskerk, M.H.Gras, S.Rossjohn, J.Godfrey, D.I.

(2014) J.Exp.Med. 211: 2599-2615

  • DOI: 10.1084/jem.20141764
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • αβ and γδ T cells are disparate T cell lineages that can respond to distinct antigens (Ags) via the use of the αβ and γδ T cell Ag receptors (TCRs), respectively. Here we characterize a population of human T cells, which we term δ/αβ T cells, express ...

    αβ and γδ T cells are disparate T cell lineages that can respond to distinct antigens (Ags) via the use of the αβ and γδ T cell Ag receptors (TCRs), respectively. Here we characterize a population of human T cells, which we term δ/αβ T cells, expressing TCRs comprised of a TCR-δ variable gene (Vδ1) fused to joining α and constant α domains, paired with an array of TCR-β chains. We demonstrate that these cells, which represent ∼50% of all Vδ1(+) human T cells, can recognize peptide- and lipid-based Ags presented by human leukocyte antigen (HLA) and CD1d, respectively. Similar to type I natural killer T (NKT) cells, CD1d-lipid Ag-reactive δ/αβ T cells recognized α-galactosylceramide (α-GalCer); however, their fine specificity for other lipid Ags presented by CD1d, such as α-glucosylceramide, was distinct from type I NKT cells. Thus, δ/αβTCRs contribute new patterns of Ag specificity to the human immune system. Furthermore, we provide the molecular bases of how δ/αβTCRs bind to their targets, with the Vδ1-encoded region providing a major contribution to δ/αβTCR binding. Our findings highlight how components from αβ and γδTCR gene loci can recombine to confer Ag specificity, thus expanding our understanding of T cell biology and TCR diversity.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, School of Biomedical Sciences and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia.,Istituto Giannina Gaslini, 16147 Genova, Italy.,Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia.,Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia.,School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, England, UK.,Department of Chemistry, University of Connecticut, Storrs, CT 06269.,Department of Hematology, Leiden University Medical Center, 2300 RC Leiden, Netherlands.,Department of Biochemistry and Molecular Biology, School of Biomedical Sciences and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia Department of Biochemistry and Molecular Biology, School of Biomedical Sciences and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, Wales, UK jamie.rossjohn@monash.edu godfrey@unimelb.edu.au.,Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia jamie.rossjohn@monash.edu godfrey@unimelb.edu.au.,Department of Biochemistry and Molecular Biology, School of Biomedical Sciences and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia Department of Biochemistry and Molecular Biology, School of Biomedical Sciences and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TCR Variable Delta 1 chain and TCR constant Alpha chain
A, C
207N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TCR Variable Beta 2 (TRBV20) chain and TCR constant Beta chain
B, D
245N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.193 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 39.257α = 88.32
b = 47.235β = 79.78
c = 109.290γ = 89.93
Software Package:
Software NamePurpose
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2014-11-26
    Type: Initial release
  • Version 1.1: 2014-12-17
    Type: Database references
  • Version 1.2: 2014-12-24
    Type: Database references